Re: [Qemu-devel] [PATCHv2 1/4] Adding new syscalls (bugzilla 855162)

[Paul Moore <pmoore@redhat.com>]

On Tuesday, October 23, 2012 03:55:29 AM Eduardo Otubo wrote:
> According to the bug 855162[0] - there's the need of adding new syscalls
> to the whitelist whenn using Qemu with Libvirt.
> 
> [0] - https://bugzilla.redhat.com/show_bug.cgi?id=855162
> 
> v2: Adding new syscalls to the list: readlink, rt_sigpending, and
>     rt_sigtimedwait
> 
> Reported-by: Paul Moore <pmoore@redhat.com>
> Signed-off-by: Eduardo Otubo <otubo@linux.vnet.ibm.com>
> ---
>  qemu-seccomp.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)

I had an opportunity to test this patchset on a F17 machine using QEMU 1.2 and 
unfortunately it still fails.  I'm using a relatively basic guest 
configuration running F16, the details are documented in the RH BZ that 
Eduardo mentioned in the patch description.

Eduardo, I assume you are not able to reproduce this?

> diff --git a/qemu-seccomp.c b/qemu-seccomp.c
> index 64329a3..a7b33e2 100644
> --- a/qemu-seccomp.c
> +++ b/qemu-seccomp.c
> @@ -45,6 +45,13 @@ static const struct QemuSeccompSyscall
> seccomp_whitelist[] = { { SCMP_SYS(access), 245 },
>      { SCMP_SYS(prctl), 245 },
>      { SCMP_SYS(signalfd), 245 },
> +    { SCMP_SYS(getrlimit), 245 },
> +    { SCMP_SYS(set_tid_address), 245 },
> +    { SCMP_SYS(socketpair), 245 },
> +    { SCMP_SYS(statfs), 245 },
> +    { SCMP_SYS(unlink), 245 },
> +    { SCMP_SYS(wait4), 245 },
> +    { SCMP_SYS(getuid), 245 },
>  #if defined(__i386__)
>      { SCMP_SYS(fcntl64), 245 },
>      { SCMP_SYS(fstat64), 245 },
> @@ -107,7 +114,11 @@ static const struct QemuSeccompSyscall
> seccomp_whitelist[] = { { SCMP_SYS(getsockname), 242 },
>      { SCMP_SYS(getpeername), 242 },
>      { SCMP_SYS(fdatasync), 242 },
> -    { SCMP_SYS(close), 242 }
> +    { SCMP_SYS(close), 242 },
> +    { SCMP_SYS(accept4), 242 },
> +    { SCMP_SYS(readlink), 242 },
> +    { SCMP_SYS(rt_sigpending), 242 },
> +    { SCMP_SYS(rt_sigtimedwait), 242 }
>  };
> 
>  int seccomp_start(void)
-- 
paul moore
security and virtualization @ redhat